Toxic effect of carbon dioxide, intentional self-harm, subs

This code signifies a harmful physiological response resulting from deliberate exposure to carbon dioxide, specifically in the context of self-inflicted injury. It indicates that the patient is receiving follow-up care for this toxic effect after the initial treatment.

Apply this code for subsequent encounters when a patient is being treated for complications or ongoing effects of intentionally inhaled carbon dioxide, such as respiratory issues, neurological damage, or other systemic sequelae. This includes follow-up appointments, rehabilitation, or further diagnostic work-ups related to the initial self-harm event.

• Always sequence this code after the primary diagnosis for the specific toxic effect or injury.
• Ensure documentation clearly states "intentional self-harm" and that the encounter is "subsequent."
• Do not use for accidental exposures or therapeutic carbon dioxide administration.